Question

Which of the following is not a derivative of carboxylic acid?
A. Anhydrides
B. Esters
C. Amines
D. Amides

Answer 1

An organic substance with a carboxyl functional group is known as a carboxylic acid. They can be found in abundance in nature and are also synthesised by humans. Carboxylic acids deprotonate to produce a carboxylate anion with the general formula $RCOO -$ , which can be used to make a variety of useful salts like soaps.

Complete answer:
Compounds that can be converted to carboxylic acids through simple acidic or basic hydrolysis are known as carboxylic acid derivatives.
Esters, amides, and nitriles are the most common acid derivatives, however acid halides and anhydrides are also derivatives.
When we replace the $-OH$ group in the structure of carboxylic acid, it leads to the formation of different carboxylic acid derivatives.
When we replace the $-OH$ group with a halide group ( $- X$ ), it leads to the formation of acyl chlorides.
When we replace the $-OH$ group with an amino group ( $- N{H_2}$ ) it leads to the formation of amides.
When we replace the $-OH$ group with an $- OR$ leads to the formation of esters.
When we replace the $-OH$ group with a $- OOCR$ leads to the formation of acid anhydrides.
Hence, the correct option is C. Amines.

Note:
To make analysis easier, chemical derivatives might be employed. Melting point (MP) analysis, for example, can help identify a variety of organic substances. It is possible to make a crystalline derivative.